GB2371941A - Loudspeakers - Google Patents

Loudspeakers Download PDF

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Publication number
GB2371941A
GB2371941A GB0209536A GB0209536A GB2371941A GB 2371941 A GB2371941 A GB 2371941A GB 0209536 A GB0209536 A GB 0209536A GB 0209536 A GB0209536 A GB 0209536A GB 2371941 A GB2371941 A GB 2371941A
Authority
GB
United Kingdom
Prior art keywords
acoustic
radiator
pattern
filter means
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0209536A
Other versions
GB0209536D0 (en
Inventor
Neil Harris
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NVF Tech Ltd
Original Assignee
New Transducers Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by New Transducers Ltd filed Critical New Transducers Ltd
Publication of GB0209536D0 publication Critical patent/GB0209536D0/en
Publication of GB2371941A publication Critical patent/GB2371941A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

A loudspeaker comprising an acoustic radiator (10) capable of supporting bending waves, an exciter mounted on the acoustic radiator (10, 28) to excite bending waves in the acoustic radiator (10, 28) to produce an acoustic output and filter means (12, 30) located adjacent to the acoustic radiator (10, 28) for directing the acoustic output from the acoustic radiator (10, 28), said filter means (12, 30) adapted to have a pattern (11) of varying acoustic absorbency, the pattern (11) being selected to produce a desired directivity of the acoustic output. The filter means (12, 30) may be in the form of an acoustic mask comprising a pattern (11) of at least one acoustic aperture (14, 16).

Description

12,UK Patent Application 'g,GB.., 2 371 941 HA (43) Date of Printing by UK
Office 07.08.2002 (21) Application No 0209536.2 (51) INTCL7 H04R 7/04 1/32
(22) Date of Filing 06.12.2000 (52) UK CL (Edition T) (30) Priority Data H4J JBA J30F (31) 9930275 (32) 21.12.1999 (33) GB H4X X8
(86) International Application Data (56) Documents Cited bylSA PCT/GB2000/004655 En 06.12.2000 EP 0924960 A WO 1999/012387 A (87) International Publication Data US 5668886 A US 5297214 A WO2001/047320 En 28.06.2001 US 3862366 A (58) Field of Search by ISA
(71) Applicant(s) INT CL7 H04R New Transducers Limited EPO-lnternal WPI Data COMPENDEX (Incorporated in the United Kingdom), Ixworth House, 37 Ixworth Place, LONDON, SW3 3QH, United Kingdom (74) Agent and/or Address for Service Maguire Boss (72) Inventor(s) 5 Crown Street, ST IVES, Cambridgeshire, PE27 5EB, Neil Harris United Kingdom {54) Abstract Title Loudspeakers {57) A loudspeaker comprising an acoustic radiator (10) capable of supporting bending waves, an exciter mounted on the acoustic radiator (10, 28) to excite bending waves in the acoustic radiator (10, 28) to produce an acoustic output and filter means (12, 30) located adjacent to the acoustic radiator (10, 28) for directing the acoustic output from the acoustic radiator (10, 28), said filter means {12, 30) adapted to have a pattern (11) of varying acoustic absorbency, the pattern (11) being selected to produce a desired directivity of the acoustic output. The filter means 12 30) may be in the form of an acoustic mask comprising a pattern (11) of at least one acoustic aperture {14, 16).
1 1 16
This international application has entered the national phase early D
GB0209536A 1999-12-21 2000-12-06 Loudspeakers Withdrawn GB2371941A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9930275.4A GB9930275D0 (en) 1999-12-21 1999-12-21 Loudspeakers
PCT/GB2000/004655 WO2001047320A1 (en) 1999-12-21 2000-12-06 Loudspeakers

Publications (2)

Publication Number Publication Date
GB0209536D0 GB0209536D0 (en) 2002-06-05
GB2371941A true GB2371941A (en) 2002-08-07

Family

ID=10866801

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9930275.4A Ceased GB9930275D0 (en) 1999-12-21 1999-12-21 Loudspeakers
GB0209536A Withdrawn GB2371941A (en) 1999-12-21 2000-12-06 Loudspeakers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB9930275.4A Ceased GB9930275D0 (en) 1999-12-21 1999-12-21 Loudspeakers

Country Status (4)

Country Link
AU (1) AU1720101A (en)
GB (2) GB9930275D0 (en)
TW (1) TW494702B (en)
WO (1) WO2001047320A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0029098D0 (en) * 2000-11-30 2001-01-10 New Transducers Ltd Vibration transducer
US6839444B2 (en) 2000-11-30 2005-01-04 New Transducers Limited Loudspeakers

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862366A (en) * 1971-08-16 1975-01-21 Elektroakusztikai Gyar Sound radiation system
US5297214A (en) * 1988-09-19 1994-03-22 Bruney Paul F Loudspeaker structure
US5668886A (en) * 1993-03-30 1997-09-16 Kabushiki Kaisha Kenwood Loudspeaker structure
WO1999002012A1 (en) * 1997-07-03 1999-01-14 New Transducers Limited Panel-form loudspeakers
WO1999012387A1 (en) * 1997-09-04 1999-03-11 New Transducers Limited Loudspeakers
WO1999011490A1 (en) * 1997-09-03 1999-03-11 New Transducers Limited Trim panel comprising an integral acoustic system
EP0924960A2 (en) * 1997-12-20 1999-06-23 NOKIA TECHNOLOGY GmbH Suspension for sound reproduction arrangements based on the bending wave principle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862366A (en) * 1971-08-16 1975-01-21 Elektroakusztikai Gyar Sound radiation system
US5297214A (en) * 1988-09-19 1994-03-22 Bruney Paul F Loudspeaker structure
US5668886A (en) * 1993-03-30 1997-09-16 Kabushiki Kaisha Kenwood Loudspeaker structure
WO1999002012A1 (en) * 1997-07-03 1999-01-14 New Transducers Limited Panel-form loudspeakers
WO1999011490A1 (en) * 1997-09-03 1999-03-11 New Transducers Limited Trim panel comprising an integral acoustic system
WO1999012387A1 (en) * 1997-09-04 1999-03-11 New Transducers Limited Loudspeakers
EP0924960A2 (en) * 1997-12-20 1999-06-23 NOKIA TECHNOLOGY GmbH Suspension for sound reproduction arrangements based on the bending wave principle

Also Published As

Publication number Publication date
TW494702B (en) 2002-07-11
GB0209536D0 (en) 2002-06-05
WO2001047320A1 (en) 2001-06-28
GB9930275D0 (en) 2000-02-09
AU1720101A (en) 2001-07-03

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)